Programmable
Controllers
Bulletin 1762 Controllers and
Expansion I/O
Maintenance of Solid State Controls publication SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.literature.rockwellautomation.com describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment. The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING Identifies information about practices or circumstances
that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.
IMPORTANT Identifies information that is critical for successful
application and understanding of the product.
ATTENTION Identifies information about practices or circumstances
that can lead to personal injury or death, property damage, or economic loss. Attentions help you:
• identify a hazard
• avoid a hazard
• recognize the consequence
SHOCK HAZARD Labels may be located on or inside the drive to alert
people that dangerous voltage may be present.
BURN HAZARD Labels may be located on or inside the drive to alert
To help you find new and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph. The table below lists the sections that document new features and additional or updated information on existing features.
Firmware Revision History
Features are added to the controllers through firmware upgrades. See the latestrelease notes, 1762-RN001, to be sure that your controller’s firmware is at the
level you need. Firmware upgrades are not required, except to allow you access to the new features.
For this information: See
Updated list of communication cables. 1-4, 2-4, 4-4 Updated list of warnings for Hazardous
Location considerations
2-4 Updated list of cables for Cable Selection Guide.
4-13
Removed catalog 1761-NET-DNI 1-4, Chapter 4 Added Relay Output life to Specifications. A-3
Important User Information . . . 1-2
Firmware Revision History . . . Summary of Changes-1
Preface
Who Should Use This Manual. . . P-1
Purpose of This Manual. . . P-1
Related Documentation. . . P-2
Common Techniques Used in This Manual . . . P-2
Chapter 1
Hardware Overview
Hardware Features . . . 1-1
Component Descriptions. . . 1-2
MicroLogix 1200 Memory Module and/or Real-time Clock. . . . 1-2
1762 Expansion I/O . . . 1-3
Communication Cables . . . 1-4
Program the Controller . . . 1-4
Communication Options . . . 1-4
Chapter 2
Install Your Controller
Required Tools . . . 2-1
Agency Certifications . . . 2-1
Compliance to European Union Directives . . . 2-2
EMC Directive. . . 2-2
Low Voltage Directive. . . 2-2
Installation Considerations . . . 2-2
Safety Considerations. . . 2-3
Hazardous Location Considerations. . . 2-3
Disconnect Main Power . . . 2-5
Safety Circuits. . . 2-5
Power Distribution . . . 2-5
Periodic Tests of Master Control Relay Circuit . . . 2-6
Power Considerations . . . 2-6
Isolation Transformers . . . 2-6
Power Supply Inrush . . . 2-6
Loss of Power Source . . . 2-7
Input States on Power Down . . . 2-7
Other Types of Line Conditions. . . 2-7
Prevent Excessive Heat . . . 2-7
Master Control Relay . . . 2-8
Use Emergency-Stop Switches . . . 2-9
Schematic (Using IEC Symbols) . . . 2-10
Schematic (Using ANSI/CSA Symbols). . . 2-11
Install a Memory Module or Real-time Clock. . . 2-12
Controller Mounting Dimensions . . . 2-13
Controller and
Expansion I/O Spacing . . . 2-13
Mount the Controller . . . 2-14
DIN Rail Mounting . . . 2-15
Panel Mounting . . . 2-16
1762 Expansion I/O Dimensions. . . 2-17
Mount 1762
Expansion I/O. . . 2-17
DIN Rail Mounting . . . 2-17
Mount on Panel . . . 2-18
Connect Expansion I/O . . . 2-19
Chapter 3
Wire Your Controller
Wire Requirements. . . 3-1
Wire without Spade Lugs. . . 3-2
Wire with Spade Lugs . . . 3-3
Use Surge Suppressors . . . 3-3
Recommended Surge Suppressors . . . 3-5
Ground the Controller . . . 3-6
Wiring Diagrams . . . 3-7
Terminal Block Layouts. . . 3-7
Terminal Groupings . . . 3-9
Sinking and Sourcing Wiring Diagrams . . . 3-12
1762-L24AWA, 1762-L24BWA, 1762-L24BXB, 1762-L24AWAR,
1762-L24BWAR and 1762-L24BXBR Wiring Diagrams . . . 3-12
1762-L40AWA, 1762-L40BWA, 1762-L40BXB, 1762-L40AWAR,
1762-L40BWAR and 1762-L40BXBR Wiring Diagrams . . . 3-15
Controller I/O Wiring . . . 3-17
Minimize Electrical Noise . . . 3-17
Expansion I/O Wiring. . . 3-18
Discrete Wiring Diagrams . . . 3-18
Analog Wiring . . . 3-25
Chapter 4
Communication Connections
Introduction . . . 4-1
Supported Communication Protocols. . . 4-1
Default Communication Configuration . . . 4-2
Use the Communications Toggle Push Button . . . 4-3
Connect to the RS-232 Port . . . 4-4
Make a DF1 Point-to-Point Connection . . . 4-5
Use a Modem . . . 4-5
Isolated Modem Connection. . . 4-6
Connect to a DF1 Half-duplex Network . . . 4-8
Connect to a DH-485 Network. . . 4-9
Recommended Tools. . . 4-9
DH-485 Communication Cable . . . 4-10
Connect the Communication Cable to the DH-485 Connector 4-10
Ground and Terminate the DH-485 Network. . . 4-12
Cable Selection Guide . . . 4-13
Recommended User-supplied Components. . . 4-15
Safety Considerations . . . 4-17
Install and Attach the AIC+ . . . 4-17
Apply Power to the AIC+. . . 4-17
Chapter 5
Use Trim Pots
Trim Pot Operation . . . 5-1
Trim Pot Information Function File . . . 5-2
Error Conditions . . . 5-2
Chapter 6
Use Real-time Clock and Memory
Modules
Real-time Clock Operation . . . 6-1
Removal/Insertion Under Power . . . 6-1
Write Data to the Real-time Clock . . . 6-2
RTC Battery Operation . . . 6-2
Memory Module Operation. . . 6-3
User Program and Data Back-up . . . 6-3
Program Compare . . . 6-4
Data File Download Protection . . . 6-4
Memory Module Write Protection . . . 6-4
Removal/Insertion Under Power . . . 6-4
Appendix A
Specifications
Controller Specifications . . . A-1
Expansion I/O Specifications . . . A-8
Discrete I/O Modules . . . A-8
Analog Modules . . . A-15
Combination Module DC-Input/Relay Output. . . A-23
Appendix B
1762 Replacement Parts
MicroLogix 1200 RTB Replacement Kit . . . B-1
Appendix C
Troubleshoot Your System
Interpret LED Indicators. . . C-1
Normal Operation . . . C-2
Error Conditions . . . C-2
Controller Error Recovery Model . . . C-3
Analog Expansion I/O Diagnostics and Troubleshooting . . . C-4
Module Operation and Channel Operation . . . C-4
Power-up Diagnostics . . . C-4
Critical and Noncritical Errors . . . C-5
Module Error Definition Table. . . C-5
Error Codes . . . C-7
Call Rockwell Automation for Assistance. . . C-8
Appendix D
Use Control Flash to Upgrade Your
Operating System
Prepare for Upgrade. . . D-1
Install ControlFlash Software . . . D-1
Prepare the Controller for Updating. . . D-2
Sequence of Operation . . . D-2
Missing/Corrupt OS LED Pattern . . . D-2
Appendix E
Connect to Networks via RS-232
Interface
RS-232 Communication Interface. . . E-1
DF1 Full-duplex Protocol . . . E-1
DF1 Half-duplex Protocol. . . E-2
Use Modems with MicroLogix 1200 Programmable Controllers E-3
DH-485 Communication Protocol . . . E-5
Devices that use the DH-485 Network . . . E-5
Important DH-485 Network Planning Considerations . . . E-6
Example DH-485 Connections. . . E-9
Modbus Communication Protocol . . . E-12
ASCII . . . E-12
Appendix F
System Loading and Heat
Dissipation
System Loading Limitations. . . F-1
System Current Loading Example Calculations (24-point Controller)
F-1
Validate the System . . . F-2
System Loading Worksheet . . . F-4
Current Loading . . . F-4
System Current Loading Example Calculations (40-point Controller)
F-6
System Loading Worksheet . . . F-8
Current Loading. . . F-8
Calculating Heat Dissipation . . . F-10
Glossary
Index
Read this preface to familiarize yourself with the rest of the manual. It provides information concerning:
•who should use this manual
•the purpose of this manual
•related documentation
•conventions used in this manual
Who Should Use This
Manual
Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use MicroLogix 1200 controllers. You should have a basic understanding of electrical circuitry and familiarity with relay logic. If you do not, obtain the proper training before using this product.
Purpose of This Manual
This manual is a reference guide for MicroLogix 1200 controllers and expansion I/O. It describes the procedures you use to install, wire, and troubleshoot your controller. This manual:•explains how to install and wire your controllers
•gives you an overview of the MicroLogix 1200 controller system
Refer to publication 1762-RM001, MicroLogix 1200 and 1500 Programmable Controllers Instruction Set Reference Manual, for the MicroLogix 1200 and 1500 instruction set and for application examples to show the instruction set in use. Refer to your RSLogix 500 programming software user documentation for more information on programming your MicroLogix 1200 controller.
Related Documentation
The following documents contain additional information concerning Rockwell Automation products. To obtain a copy, contact your local
Rockwell Automation office or distributor.
Common Techniques Used
in This Manual
The following conventions are used throughout this manual:
• Bulleted lists such as this one provide information, not procedural steps.
• Numbered lists provide sequential steps or hierarchical information.
Resource Description
MicroLogix 1200 and 1500 Programmable Controllers Instruction Set Reference Manual, publication 1762-RM001
Information on the MicroLogix 1200 Controllers instruction set.
MicroLogix 1200 Programmable Controllers Installation Instructions, publication 1762-IN006
Information on mounting and wiring the MicroLogix 1200 Controllers, including a mounting template for easy installation.
Advanced Interface Converter (AIC+) User Manual, publication 1761-UM004
A description on how to install and connect an AIC+. This manual also contains information on network wiring.
DeviceNet Interface User Manual, publication 1761-UM005
Information on how to install, configure, and commission a DNI. DF1 Protocol and Command Set Reference Manual,
publication 1770-6.5.16
Information on DF1 open protocol. Modbus Protocol Specifications available from
www.modbus.org
Information about the Modbus protocol. Allen-Bradley Programmable Controller Grounding and
Wiring Guidelines, publication 1770-4.1
In-depth information on grounding and wiring Allen-Bradley programmable controllers.
Application Considerations for Solid-State Controls, publication SGI-1.1
A description of important differences between solid-state programmable controller products and hard-wired electromechanical devices.
National Electrical Code - Published by the National Fire Protection Association of Boston, MA.
An article on wire sizes and types for grounding electrical equipment. Allen-Bradley Industrial Automation Glossary,
publication AG-7.1
Hardware Overview
Hardware Features
The Bulletin 1762, MicroLogix 1200 programmable controller contains a power supply, input and output circuits, and a processor. The controller is available in 24 I/O and 40 I/O configurations.Figure 1.1 Hardware Features of the Controller
Table 1.1 Hardware Features
Feature Description Feature Description
1 Terminal Blocks
(Removable Terminal Blocks on 40-point controllers only.)
7 Terminal Doors and Labels
2 Bus Connector Interface to Expansion I/O 8 Trim Pots
3 Input LEDs 9 Communications Toggle Push Button
4 Output LEDs 10 Memory Module Port Cover(1) -or-
Memory Module and/or Real-Time Clock(2) 5 Communication Port/
Channel 0
11 DIN Rail Latches
6 Status LEDs 12 Programmer/HMI Port
(Equipped with 1762-LxxxxxR controllers only)
(1) Shipped with controller. (2) Optional equipment. 12 1 2 3 4 5 6 7 7 9 8 10 11 COM 0 1
Component Descriptions
These sections provide component descriptions for:• MicroLogix 1200 Memory Module and/or Real-time Clock
• 1762 Expansion I/O
MicroLogix 1200 Memory Module and/or Real-time Clock
The controller is shipped with a memory module port cover in place. You can order a memory module, real-time clock, or memory module and real-time clock as an accessory.
Table 1.2 Controller Input Power and Embedded I/O
Catalog Number Description
Input Power Inputs Outputs
1762-L24AWA, 1762-L24AWAR 120/240V ac (14) 120V ac (10) relay 1762-L24BWA, 1762-L24BWAR 120/240V ac (10) 24V dc (4) fast 24V dc (10) relay 1762-L24BXB, 1762-L24BXBR 24V dc (10) 24V dc (4) fast 24V dc (5) relay, (4) 24V dc FET (1) high-speed 24V dc FET 1762-L40AWA, 1762-L40AWAR 120/240V ac (24) 120V ac (16) relay
1762-L40BWA, 1762-L40BWAR 120/240V ac (20) 24V dc (4) fast 24V dc (16) relay 1762-L40BXB, 1762-L40BXBR 24V dc (20) 24V dc (4) fast 24V dc (8) relay, (7) 24V dc FET (1) high-speed 24V dc FET
Table 1.3 Memory Module and/or Real-time Clock
Catalog Number Description
1762-MM1 Memory Module only 1762-RTC Real-time Clock only
1762 Expansion I/O
1762 expansion I/O can be connected to the MicroLogix 1200 controller, as shown below.
1762 Expansion I/O 1762 Expansion I/O Connected to MicroLogix 1200 Controller
TIP A maximum of six I/O modules, in certain combinations,
may be connected to a controller. See Appendix F, System Loading and Heat Dissipation, to determine valid
combinations.
Table 1.4 Expansion I/O
Catalog Number Descriptions
1762-IA8 8-point 120V ac Input
1762-IQ8 8-point Sink/Source 24V dc Input 1762-IQ16 16-point Sink/Source 24V dc Input 1762-IQ32T 32-point Sink/Source 24V dc Input Module 1762-OA8 8-point AC Triac Output
1762-OB8 8-point Sourcing 24V dc Output 1762-OB16 16-point Sourcing 24V dc Output 1762-OB32T 32-point Sourcing 24V dc Output Module 1762-OV32T 32-point Sinking 24V dc Output Module 1762-OW8 8-point AC/DC Relay Output
1762-OW16 16-point AC/DC Relay Output 1762-OX6I 6-point Isolated Relay Output
1762-IF2OF2 2-channel Analog Voltage/Current Input 2-channel Analog Voltage/Current Output 1762-IF4 4-channel Analog Voltage/Current Input 1762-OF4 4-channel Analog Voltage/Current Output 1762-IR4 RTD/Resistance Input
1762-IT4 Thermocouple/mV Input
Communication Cables
Use only the following communication cables with the MicroLogix 1200 controllers.• 1761-CBL-PM02 series C or later
• 1761-CBL-HM02 series C or later
• 1761-CBL-AM00 series C or later
• 1761-CBL-AP00 series C or later
• 1761-CBL-PH02 Series A or later
• 1761-CBL-AH02 Series A or later
• 2707-NC8 series A or later
• 2702-NC9 series B or later
• 2707-NC10 series B or later
• 2707-NC11 series B or later
Program the Controller
You program the MicroLogix 1200 programmable controller using RSLogix 500, revision 4 or later. You must use revision 4.5 or later of RSLogix 500 in order to use the new features of the series B MicroLogix 1200 controllers, including the full ASCII instruction set. Communication cables for programming are not included with the software.Communication Options
The MicroLogix 1200 can be connected to a personal computer. It can also be connected to a DH-485 network, or a Modbus network as an RTU Master or RTU Slave using an Advanced Interface Converter (catalog number1761-NET-AIC). The controller can also be connected to DF1 Half-duplex networks as an RTU Master or RTU Slave. Series B controllers may also be connected to serial devices using ASCII.
See Chapter 4 Communication Connections for more information on connecting to the available communication options.
The 1762-LxxxxxR controllers provide an additional communication port called the Programmer/HMI Port. This port supports DF1 full-duplex protocol only. The controller cannot initiate messages through this port. It can only respond to messages sent to it. All communication parameters are fixed and cannot be changed by a user.
See Default Communication Configuration on page 4-2 for the configuration settings.
Install Your Controller
This chapter shows you how to install your controller. Topics include:
•required tools
•agency certifications
•compliance to European Union Directives
•installation considerations
•safety considerations
•power considerations
•preventing excessive heat
•master control relay
•install the memory module and/or real-time clock
•controller mounting dimensions
•controller and expansion I/O spacing
•mount the controller
•mount 1762 expansion I/O
•connect 1762 expansion I/O
Required Tools
You need a screwdriver and a drill.Agency Certifications
•UL 508•C-UL under CSA C22.2 no. 142
•Class I, Division 2, Groups A, B, C, D
(UL 1604, C-UL under CSA C22.2 no. 213)
•CE compliant for all applicable directives
Compliance to European
Union Directives
This product has the CE mark and is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:
• EN 50081-2
EMC - Generic Emission Standard, Part 2 - Industrial Environment
• EN 50082-2
EMC - Generic Immunity Standard, Part 2 - Industrial Environment This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 61131-2 Programmable Controllers, Part 2 - Equipment Requirements and Tests.
For specific information required by EN 61131-2, see the appropriate sections in this publication, as well as the following Allen-Bradley publications:
• Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity, publication 1770-4.1
• Guidelines for Handling Lithium Batteries, publication AG-5.4
• Automation Systems Catalog, publication B113
Installation Considerations
Most applications require installation in an industrial enclosure (PollutionDegree 2(1)) to reduce the effects of electrical interference (Over Voltage
Category II(2)) and environmental exposure. Locate your controller as far as
possible from power lines, load lines, and other sources of electrical noise such as hard-contact switches, relays, and AC motor drives. For more information on proper grounding guidelines, see the Industrial Automation Wiring and Grounding Guidelines publication 1770-4.1.
(1) Pollution Degree 2 is an environment where normally only non-conductive pollution occurs except that occasionally temporary conductivity caused by condensation shall be expected.
Safety Considerations
Safety considerations are an important element of proper system installation. Actively thinking about the safety of yourself and others, as well as the condition of your equipment, is of primary importance. We recommend reviewing the following safety considerations.Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations.
ATTENTION Vertical mounting of the controller is not
recommended due to heat build-up considerations.
ATTENTION Be careful of metal chips when drilling mounting
holes for your controller or other equipment within the enclosure or panel. Drilled fragments that fall into the controller or I/O modules could cause damage. Do not drill holes above a mounted controller if the protective debris shields are removed or the processor is installed.
Use only the following communication cables in Class I, Division 2 hazardous locations.
WARNING EXPLOSION HAZARD
•Substitution of components may impair suitability
for Class I, Division 2.
•Do not replace components or disconnect
equipment unless power has been switched off.
•Do not connect or disconnect components unless
power has been switched off.
•This product must be installed in an enclosure.
All cables connected to the product must remain in the enclosure or be protected by conduit or other means.
•All wiring must comply with N.E.C. article 501-4(b).
•The interior of the enclosure must be accessible only by
the use of a tool.
•For applicable equipment (for example, relay modules),
exposure to some chemicals may degrade the sealing properties of the materials used in these devices:
–Relays, epoxy
It is recommended that you periodically inspect these devices for any degradation of properties and replace the module if degradation is found.
Communication Cables for Class I, Division 2 Hazardous Locations
1761-CBL-PM02 series C or later 1761-CBL-HM02 series C or later 1761-CBL-AM00 series C or later 1761-CBL-AP00 series C or later 1761-CBL-PH02 series A or later 1761-CBL-AH02 series A or later 2707-NC8 series A or later 2707-NC9 series B or later 2707-NC10 series B or later 2707-NC11 series B or later
Disconnect Main Power
The main power disconnect switch should be located where operators and maintenance personnel have quick and easy access to it. In addition to disconnecting electrical power, all other sources of power (pneumatic and hydraulic) should be de-energized before working on a machine or process controlled by a controller.
Safety Circuits
Circuits installed on the machine for safety reasons, like overtravel limit switches, stop push buttons, and interlocks, should always be hard-wired directly to the master control relay. These devices must be wired in series so that when any one device opens, the master control relay is de-energized, thereby removing power to the machine. Never alter these circuits to defeat their function. Serious injury or machine damage could result.
Power Distribution
There are some points about power distribution that you should know:
•The master control relay must be able to inhibit all machine motion by
removing power to the machine I/O devices when the relay is de-energized. It is recommended that the controller remain powered even when the master control relay is de-energized.
•If you are using a dc power supply, interrupt the load side rather than
the ac line power. This avoids the additional delay of power supply turn-off. The dc power supply should be powered directly from the fused secondary of the transformer. Power to the dc input and output circuits should be connected through a set of master control relay contacts.
WARNING Explosion Hazard
Do not replace components or disconnect equipment unless power has been switched off.
WARNING Explosion Hazard
Do not connect or disconnect connectors while circuit is live.
Periodic Tests of Master Control Relay Circuit
Any part can fail, including the switches in a master control relay circuit. The failure of one of these switches would most likely cause an open circuit, which would be a safe power-off failure. However, if one of these switches shorts out, it no longer provides any safety protection. These switches should be tested periodically to assure they will stop machine motion when needed.
Power Considerations
The following explains power considerations for the micro controllers.Isolation Transformers
You may want to use an isolation transformer in the ac line to the controller. This type of transformer provides isolation from your power distribution system to reduce the electrical noise that enters the controller and is often used as a step-down transformer to reduce line voltage. Any transformer used with the controller must have a sufficient power rating for its load. The power rating is expressed in volt-amperes (VA).
Power Supply Inrush
During power-up, the MicroLogix 1200 power supply allows a brief inrush current to charge internal capacitors. Many power lines and control
transformers can supply inrush current for a brief time. If the power source cannot supply this inrush current, the source voltage may sag momentarily. The only effect of limited inrush current and voltage sag on the MicroLogix 1200 is that the power supply capacitors charge more slowly. However, the effect of a voltage sag on other equipment should be considered. For example, a deep voltage sag may reset a computer connected to the same power source. The following considerations determine whether the power source must be required to supply high inrush current:
• The power-up sequence of devices in a system.
• The amount of the power source voltage sag if the inrush current
cannot be supplied.
• The effect of voltage sag on other equipment in the system.
If the entire system is powered-up at the same time, a brief sag in the power source voltage typically will not affect any equipment.
Loss of Power Source
The power supply is designed to withstand brief power losses without affecting the operation of the system. The time the system is operational during power loss is called ‘program scan hold-up time after loss of power’. The duration of the power supply hold-up time depends on the type and state of the I/O, but is typically between 10 milliseconds and 3 seconds. When the duration of power loss reaches this limit, the power supply signals the
processor that it can no longer provide adequate dc power to the system. This is referred to as a power supply shutdown. The processor then performs an orderly shutdown of the controller.
Input States on Power Down
The power supply hold-up time as described above is generally longer than the turn-on and turn-off times of the inputs. Because of this, the input state change from ‘On’ to ‘Off ’ that occurs when power is removed may be recorded by the processor before the power supply shuts down the system. Understanding this concept is important. The user program should be written to take this effect into account.
Other Types of Line Conditions
Occasionally the power source to the system can be temporarily interrupted. It is also possible that the voltage level may drop substantially below the normal line voltage range for a period of time. Both of these conditions are considered to be a loss of power for the system.
Prevent Excessive Heat
For most applications, normal convective cooling keeps the controller within the specified operating range. Ensure that the specified temperature range is maintained. Proper spacing of components within an enclosure is usually sufficient for heat dissipation.In some applications, a substantial amount of heat is produced by other equipment inside or outside the enclosure. In this case, place blower fans inside the enclosure to assist in air circulation and to reduce “hot spots” near the controller.
Additional cooling provisions might be necessary when high ambient temperatures are encountered.
Master Control Relay
A hard-wired master control relay (MCR) provides a reliable means for emergency machine shutdown. Since the master control relay allows the placement of several emergency-stop switches in different locations, its installation is important from a safety standpoint. Overtravel limit switches or mushroom-head push buttons are wired in series so that when any of them opens, the master control relay is de-energized. This removes power to input and output device circuits. Refer to the figures on pages 2-10 and 2-11.Place the main power disconnect switch where operators and maintenance personnel have quick and easy access to it. If you mount a disconnect switch inside the controller enclosure, place the switch operating handle on the outside of the enclosure, so that you can disconnect power without opening the enclosure.
Whenever any of the emergency-stop switches are opened, power to input and output devices should be removed.
When you use the master control relay to remove power from the external I/O circuits, power continues to be provided to the controller’s power supply so
TIP Do not bring in unfiltered outside air. Place the
controller in an enclosure to protect it from a corrosive atmosphere. Harmful contaminants or dirt could cause improper operation or damage to components. In extreme cases, you may need to use air conditioning to protect against heat build-up within the enclosure.
ATTENTION Never alter these circuits to defeat their function
since serious injury and/or machine damage could result.
TIP If you are using an external dc power supply,
interrupt the dc output side rather than the ac line side of the supply to avoid the additional delay of power supply turn-off.
The ac line of the dc output power supply should be fused.
Connect a set of master control relays in series with the dc power supplying the input and output circuits.
The master control relay is not a substitute for a disconnect to the controller. It is intended for any situation where the operator must quickly de-energize I/O devices only. When inspecting or installing terminal connections, replacing output fuses, or working on equipment within the enclosure, use the disconnect to shut off power to the rest of the system.
Use Emergency-Stop Switches
When using emergency-stop switches, adhere to the following points:
•Do not program emergency-stop switches in the controller program.
Any emergency-stop switch should turn off all machine power by turning off the master control relay.
•Observe all applicable local codes concerning the placement and
labeling of emergency-stop switches.
•Install emergency-stop switches and the master control relay in your
system. Make certain that relay contacts have a sufficient rating for your application. Emergency-stop switches must be easy to reach.
•In the following illustration, input and output circuits are shown with
MCR protection. However, in most applications, only output circuits require MCR protection.
The following illustrations show the Master Control Relay wired in a grounded system.
TIP Do not control the master control relay with the
controller. Provide the operator with the safety of a direct connection between an emergency-stop switch and the master control relay.
TIP In most applications input circuits do not require
MCR protection; however, if you need to remove power from all field devices, you must include MCR contacts in series with input power wiring.
Schematic (Using IEC Symbols)
Disconnect Isolation Transformer Emergency-Stop Push Button Fuse MCR 230V ac I/O CircuitsOperation of either of these contacts will remove power from the external I/O circuits, stopping machine motion.
Fuse Overtravel Limit Switch MCR MCR MCR Stop Start
Line Terminals: Connect to terminals of Power Supply (1762-L24AWA, 1762-L24BWA, 1762-L40AWA, 1762-L40BWA, 1762-L24AWAR, 1762-L24BWAR, 1762-L40AWAR, and 1762-L40BWAR).
115V ac or 230V ac I/O Circuits
L1 L2
230V ac
Master Control Relay (MCR) Cat. No. 700-PK400A1
Suppressor Cat. No. 700-N24 MCR Suppr. 24V dc I/O Circuits (Lo) (Hi) dc Power Supply. Use IEC 950/EN 60950 X1 115V ac X2
or 230V ac
Line Terminals: Connect to 24V dc terminals of Power Supply (1762-L24BXB, 1762-L40BXB, 1762-L24BXBR, and 1762-L40BXBR).
Schematic (Using ANSI/CSA Symbols)
Emergency-Stop Push Button 230V ac
Operation of either of these contacts will remove power from the external I/O circuits, stopping machine motion.
Fuse MCR Fuse MCR MCR MCR Stop Start
Line Terminals: Connect to terminals of Power Supply (1762-L24AWA, 1762-L24BWA, 1762-L40AWA, 1762-L40BWA, 1762-L24AWAR, 1762-L24BWAR, 1762-L40AWAR, and 1762-L40BWAR).
Line Terminals: Connect to 24V dc terminals of Power Supply (1762-L24BXB, 1762-L40BXB, 1762-L24BXBR, and 1762-L40BXBR). 230V ac Output Circuits Disconnect Isolation Transformer 115V ac or 230V ac I/O Circuits L1 L2
Master Control Relay (MCR) Cat. No. 700-PK400A1
Suppressor Cat. No. 700-N24
(Lo) (Hi)
dc Power Supply. Use NEC Class 2 for UL Listing. X1 115V ac or X2 230V ac _ + MCR 24 V dc I/O Circuits Suppr. Overtravel Limit Switch
Install a Memory Module or
Real-time Clock
1. Remove the memory module port cover.
2. Align the connector on the memory module with the connector pins on
the controller.
Controller Mounting
Dimensions
Controller and
Expansion I/O Spacing
The controller mounts horizontally, with the expansion I/O extending to the right of the controller. Allow 50 mm (2 in.) of space on all sides of the controller system for adequate ventilation. Maintain spacing from enclosure walls, wireways, and adjacent equipment, as shown below.
Table 2.1 Controller Dimensions
Dimension 1762-L24AWA 1762-L24AWAR 1762-L24BWA 1762-L24BWAR 1762-L24BXB 1762-L24BXBR 1762-L40AWA 1762-L40AWAR 1762-L40BWA 1762-L40BWAR 1762-L40BXB 1762-L40BXBR A 90 mm (3.5 in.) 90 mm (3.5 in.) B 110 mm (4.33 in.) 160 mm (6.30 in.) C 87 mm (3.43 in.) 87 mm (3.43 in.) C B A C B A 1762-L24AWA, 1762-L24BWA, 1762-L24BXB 1762-L24AWAR, 1762-L24BWAR, 1762-L24BXBR 1762-L40AWA, 1762-L40BWA, 1762-L40BXB 1762-L40AWAR, 1762-L40BWAR, 1762-L40BXBR MicroLogix 1200
1762 I/O 1762 I/O 1762 I/O
Side Side
Top
Mount the Controller
MicroLogix 1200 controllers are suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, thisequipment is intended for use in clean, dry environments (Pollution degree
2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC
60664-1).(3)
(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.
ATTENTION Do not remove the protective debris shield until after
the controller and all other equipment in the panel near the controller are mounted and wiring is complete. Once wiring is complete, remove protective debris shield. Failure to remove shield before operating can cause overheating.
ATTENTION Electrostatic discharge can damage semiconductor
devices inside the controller. Do not touch the connector pins or other sensitive areas.
TIP For environments with greater vibration and shock
concerns, use the panel mounting method described on page 2-16, rather than DIN rail mounting.
DIN Rail Mounting
The maximum extension of the latch is 14 mm (0.55 in.) in the open position. A flat-blade screwdriver is required for removal of the controller. The
controller can be mounted to EN50022-35x7.5 or EN50022-35x15 DIN rails. DIN rail mounting dimensions are shown below.
To install your controller on the DIN rail:
1. Mount your DIN rail. (Make sure that the placement of the controller
on the DIN rail meets the recommended spacing requirements, see Controller and Expansion I/O Spacing on page 2-13. Refer to the mounting template inside the back cover of this document.)
2. Close the DIN latch, if it is open.
3. Hook the top slot over the DIN rail.
4. While pressing the controller down against the top of the rail, snap the
bottom of the controller into position.
5. Leave the protective debris shield attached until you are finished wiring
the controller and any other devices. To remove your controller from the DIN rail:
1. Place a flat-blade screwdriver in the DIN rail latch at the bottom of the
controller.
2. Holding the controller, pry downward on the latch until the latch locks
in the open position.
3. Repeat steps 1 and 2 for the second DIN rail latch.
4. Unhook the top of the DIN rail slot from the rail.
27.5 mm (1.08 in.) 27.5 mm (1.08 in.) 90 mm (3.5 in.)
Panel Mounting
Mount to panel using #8 or M4 screws. To install your controller using mounting screws:
1. Remove the mounting template from inside the back cover of the
MicroLogix 1200 Programmable Controllers Installation Instructions, publication 1762-IN006.
2. Secure the template to the mounting surface. (Make sure your controller
is spaced properly. See Controller and Expansion I/O Spacing on page 2-13.)
3. Drill holes through the template.
4. Remove the mounting template.
5. Mount the controller.
6. Leave the protective debris shield in place until you are finished wiring
the controller and any other devices.
open closed
Mounting Template
1762 Expansion I/O
Dimensions
Mount 1762
Expansion I/O
DIN Rail Mounting
The module can be mounted using the following DIN rails:
•35 x 7.5 mm (EN 50 022 - 35 x 7.5), or
•35 x 15 mm (EN 50 022 - 35 x 15).
Before mounting the module on a DIN rail, close the DIN rail latch. Press the DIN rail mounting area of the module against the DIN rail. The latch
momentarily opens and locks into place.
Dimension Expansion I/O Module
A 90 mm (3.5 in.) B 40 mm (1.57 in.) C 87 mm (3.43 in.) A B C
ATTENTION During panel or DIN rail mounting of all devices, be
sure that all debris (metal chips, wire stands) is kept from falling into the module. Debris that falls into the module could cause damage when the module is under power.
Use DIN rail end anchors (Allen-Bradley part number 1492-EA35 or
1492-EAH35) for vibration or shock environments. The following illustration shows the location of the end anchors.
Mount on Panel
Use the dimensional template shown below to mount the module. The preferred mounting method is to use two M4 or #8 panhead screws per module. Mounting screws are required on every module.
TIP 1762 expansion I/O must be mounted horizontally as
illustrated.
TIP For environments with greater vibration and shock
concerns, use the panel mounting method described below, instead of DIN rail mounting.
End Anchor End Anchor 90 (3.54) 100 (3.94) 40.4 (1.59) A B 40.4 (1.59) 14.5 (0.57) MicroLogix
1200 1762 I/O 1762 I/O 1762 I/O
For more than 2 modules: (number of modules - 1) x 40 mm (1.58 in.)
NOTE: All dimensions are in mm (inches). Hole spacing tolerance: ±0.4 mm (0.016 in.). A = 95.86mm (3.774 in.)
1762-L24AWA, 1762-L24BWA, 1762-L24BXB 1762-L24AWAR, 1762-L24BWAR, 1762-L24BXBR
B = 145.8 mm (5.739 in.)
Connect Expansion I/O
The expansion I/O module is attached to the controller or another I/O module by means of a flat ribbon cable after mounting, as shown below.TIP Use the pull loop on the connector to disconnect
modules. Do not pull on the ribbon cable.
TIP Up to six expansion I/O modules can be connected
to a controller depending upon the power supply loading.
ATTENTION Remove power before removing or inserting an I/O
module. When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:
• sending an erroneous signal to your system’s field
devices, causing the controller to fault
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance, reducing product reliability.
WARNING EXPLOSION HAZARD
In Class I, Division 2 applications, the bus connector must be fully seated and the bus connector cover must be snapped in place.
In Class I, Division 2 applications, all modules must be mounted in direct contact with each other as
shown on page 2-19. If DIN rail mounting is used, an end stop must be installed ahead of the controller and after the last 1762 I/O module.
Wire Your Controller
This chapter describes how to wire your controller and expansion I/O. Topics include:
•wire requirements
•using surge suppressors
•grounding the controller
•wiring diagrams
•sinking and sourcing wiring diagrams
•controller I/O wiring
•expansion I/O wiring
Wire Requirements
•Allow for at least 50 mm (2 in) between I/O wiring ducts or terminal
strips and the controller.
•Route incoming power to the controller by a path separate from the
device wiring. Where paths must cross, their intersection should be perpendicular.
ATTENTION Before you install and wire any device, disconnect
power to the controller system.
ATTENTION Calculate the maximum possible current in each
power and common wire. Observe all electrical codes dictating the maximum current allowable for each wire size. Current above the maximum ratings may cause wiring to overheat, which can cause damage.
United States Only: If the controller is installed within a potentially hazardous environment, all wiring must comply with the requirements stated in the National Electrical Code 501-4 (b).
• Separate wiring by signal type. Bundle wiring with similar electrical characteristics together.
• Separate input wiring from output wiring.
• Label wiring to all devices in the system. Use tape, shrink-tubing, or
other dependable means for labeling purposes. In addition to labeling, use colored insulation to identify wiring based on signal characteristics. For example, you may use blue for dc wiring and red for ac wiring.
Wire without Spade Lugs
When wiring without spade lugs, it is recommended to keep the finger-safe covers in place. Loosen the terminal screw and route the wires through the opening in the finger-safe cover. Tighten the terminal screw making sure the pressure plate secures the wire.
TIP Do not run signal or communication wiring and
power wiring in the same conduit. Wires with different signal characteristics should be routed by separate paths.
Table 3.1 Wire Requirements
Wire Type Wire Size (2 wire maximum per terminal screw)(1)
(1) Wiring torque = 0.791 Nm (7 lb-in) rated
Solid Cu-90 °C (194 °F) #14 to #22 AWG Stranded Cu-90 °C (194 °F) #16 to #22 AWG
Wire with Spade Lugs
The diameter of the terminal screw head is 5.5 mm (0.220 in.). The input and output terminals of the MicroLogix 1200 controller are designed for a 6.35 mm (0.25 in.) wide spade (standard for #6 screw for up to 14 AWG) or a 4 mm (metric #4) fork terminal.
When using spade lugs, use a small, flat-blade screwdriver to pry the
finger-safe cover from the terminal blocks as shown below. Then loosen the terminal screw.
Use Surge Suppressors
Because of the potentially high current surges that occur when switching inductive load devices, such as motor starters and solenoids, the use of some type of surge suppression to protect and extend the operating life of the controllers output contacts is required. Switching inductive loads withoutsurge suppression can significantlyreduce the life expectancy of relay contacts.
By adding a suppression device directly across the coil of an inductive device, you prolong the life of the output or relay contacts. You also reduce the effects of voltage transients and electrical noise from radiating into adjacent systems.
The following diagram shows an output with a suppression device. We recommend that you locate the suppression device as close as possible to the load device.
If the outputs are dc, we recommend that you use an 1N4004 diode for surge suppression, as shown below. For inductive dc load devices, a diode is suitable. A 1N4004 diode is acceptable for most applications. A surge suppressor can also be used. See Table 3.2 for recommended suppressors. As shown below, these surge suppression circuits connect directly across the load device.
Suitable surge suppression methods for inductive ac load devices include a varistor, an RC network, or an Allen-Bradley surge suppressor, all shown below. These components must be appropriately rated to suppress the switching transient characteristic of the particular inductive device. See the table on page 3-5 for recommended suppressors.
+dc or L1 Suppression Device dc COM or L2 ac or dc Outputs Load VAC/DC Out 0 Out 1 Out 2 Out 3 Out 4 Out 5 Out 6 Out 7 COM +24V dc IN4004 Diode Relay or Solid State dc Outputs 24V dc common VAC/DC Out 0 Out 1 Out 2 Out 3 Out 4 Out 5 Out 6 Out 7 COM (A surge suppressor can also be used.)
Surge Suppression for Inductive ac Load Devices
Output Device Output Device Output Device
Recommended Surge Suppressors
Use the Allen-Bradley surge suppressors shown in the following table for use with relays, contactors, and starters.
Table 3.2 Recommended Surge Suppressors
Device Coil Voltage Suppressor Catalog
Number
Bulletin 509 Motor Starter Bulletin 509 Motor Starter
120V ac
240V ac 599-K04
(1)
599-KA04(1)
(1) Varistor – Not recommended for use on relay outputs.
Bulletin 100 Contactor Bulletin 100 Contactor 120V ac 240V ac 199-FSMA1 (2) 199-FSMA2(2)
(2) RC Type – Do not use with Triac outputs.
Bulletin 709 Motor Starter 120V ac 1401-N10(2)
Bulletin 700 Type R, RM Relays ac coil None Required Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
12V dc 12V dc
199-FSMA9 Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
24V dc 24V dc
199-FSMA9 Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
48V dc 48V dc
199-FSMA9 Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
115-125V dc 115-125V dc
199-FSMA10 Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
230-250V dc 230-250V dc
199-FSMA11 Bulletin 700 Type N, P, or PK Relay 150V max, ac or dc 700-N24(2)
Miscellaneous electromagnetic devices limited to 35 sealed VA
Ground the Controller
In solid-state control systems, grounding and wire routing helps limit the effects of noise due to electromagnetic interference (EMI). Run the ground connection from the ground screw of the controller to the ground bus prior to connecting any devices. Use AWG #14 wire. For AC-powered controllers, this connection must be made for safety purposes.This product is intended to be mounted to a well grounded mounting surface
such as a metal panel. Refer to theIndustrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1, for additional information. Additional grounding connections from the mounting tab or DIN rail, if used, are not required unless the mounting surface cannot be grounded.
ATTENTION All devices connected to the RS-232 channel must be referenced to controller ground, or
be floating (not referenced to a potential other than ground). Failure to follow this procedure may result in property damage or personal injury.
• For 1762-L24BWA, 1762-L40BWA, 1762-L24BWAR, and 1762-L40BWAR controllers:
The COM of the sensor supply is also connected to chassis ground internally. The 24V dc sensor power source should not be used to power output circuits. It should only be used to power input devices.
• For 1762-L24BXB, 1762-L40BXB, 1762-L24BXBR, and 1762-L40BXBR controllers:
The VDC NEUT or common terminal of the power supply is also connected to chassis ground internally.
TIP Use all four mounting positions for panel mounting
installation.
ATTENTION Remove the protective debris strip before applying
power to the controller. Failure to remove the strip may cause the controller to overheat.
Wiring Diagrams
The following illustrations show the wiring diagrams for the MicroLogix 1200 controllers. Controllers with dc inputs can be wired as either sinking or sourcing inputs. (Sinking and sourcing does not apply to ac inputs.) Refer to Sinking and Sourcing Wiring Diagrams on page 3-12The controller terminal block layouts are shown below. The shading on the labels indicates how the terminals are grouped. A detail of the groupings is shown in the table following the terminal block layouts.
Terminal Block Layouts
Figure 3.1 1762-L24AWA and 1762-L24AWAR
TIP This symbol denotes a protective earth ground
terminal which provides a low impedance path between electrical circuits and earth for safety purposes and provides noise immunity
improvement. This connection must be made for safety purposes on ac-powered controllers.
This symbol denotes a functional earth ground
terminal which provides a low impedance path between electrical circuits and earth for non-safety purposes, such as noise immunity improvement.
VAC L1 VAC NEUT VAC DC 0 VAC DC 1 VAC DC 2 OUT 3 VAC DC 4
OUT 4 OUT 7 OUT 9 OUT 0 OUT 1 OUT 2 VAC
DC3
OUT 5 OUT 6 OUT 8 IN 0 IN 2 COM IN 5 IN 7 IN 9 1 IN 11 IN 13 NC COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 NC Inputs Outputs Group 0 Group 1 Gro up 0 Gro up 1 Gro up 2 Gro up 3 Gro up 4
Figure 3.2 1762-L24BWA and 1762-L24BWAR
Figure 3.3 1762-L24BXB and 1762-L24BXBR
Figure 3.4 1762-L40AWA and 1762-L40AWAR
ATTENTION The 24V dc sensor supply of the 1762-L24BWA and
1762-L24BWAR should not be used to power output circuits. It should only be used to power input devices (for example sensors and switches). See Master Control Relay on page 2-8 for information on MCR wiring in output circuits. VAC L1 VAC NEUT VAC DC 0 OUT 0 VAC DC 1 OUT 1 VAC DC 2 OUT 2 VAC DC 3 OUT 3 VAC DC 4 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 OUT 9 +24 VDC 24 COM IN 0 IN 2 COM IN 5 IN 7 IN 9 1 IN 11 IN 13 COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 Group 0 Group 1 Gro up 0 Gro up 1 Gro up 2 Gro up 3 Gro up 4 Inputs Outputs +24 VDC VDC NEUT OUT 0 OUT 1 OUT 2 OUT 4 OUT 6 VAC DC 3 OUT 8 IN 0 IN 2 COM IN 5 IN 7 IN 9 1 IN 11 IN 13 NC COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 NC VAC DC 0 VAC DC 1 VDC 2 OUT 3 OUT 5 OUT 7 OUT 9 COM 2 Group 0 Group 1 Gro up 0 Gro up 1 Gro up 2 Gro up 3 OUT 11 VAC DC 4 OUT 15 VAC L1 OUT 0 OUT 1 OUT 2 VAC DC 3 OUT 7 OUT 5 OUT 8 OUT 13 OUT 10 VAC DC 5 NC IN 0 IN 2 COM IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 COM 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23 COM 2 NC VAC NEUT VAC DC 0 VAC DC 1 VAC DC 2 OUT 3 OUT 4 OUT 6 OUT 9 OUT 14 OUT 12 Inputs Outputs Group 0 Group 1 Gro up 0 Group 2 Gro up 1 Gro up 2 Gro up 3 Gro up 4 Gro up 5
Figure 3.5 1762-L40BWA and 1762-L40BWAR
Figure 3.6 1762-L40BXB and 1762-L40BXBR
Terminal Groupings
ATTENTION The 24V dc sensor supply of the 1762-L40BWA and
1762-L40BWAR should not be used to power output circuits. It should only be used to power input devices (for example sensors and switches). See Master Control Relay on page 2-8 for information on MCR wiring in output circuits.
Table 3.3 Input Terminal Grouping
Controller Inputs
Input Group Common Terminal Input Terminal
1762-L24AWA 1762-L24AWAR
Group 0 AC COM 0 I/0 through I/3 Group 1 AC COM 1 I/4 through I/13 1762-L24BWA
1762-L24BWAR
Group 0 DC COM 0 I/0 through I/3 Group 1 DC COM 1 I/4 through I/13 1762-L24BXB
1762-L24BXBR
Group 0 DC COM 0 I/0 through I/3 Group 1 DC COM 1 I/4 through I/13 1762-L40AWA
1762-L40AWAR
Group 0 AC COM 0 I/0 through I/3 Group 1 AC COM 1 I/4 through I/7 Group 2 AC COM 2 I/8 through I/23
OUT 11 VAC DC 4 VAC NEUT VAC DC 0 VAC DC 1 VAC DC 2 OUT 3 OUT 4 6 OUT OUT 9 OUT 14 OUT 12 OUT 15 VAC L1 OUT 0 OUT 1 OUT 2 VAC DC 3 OUT 7 OUT 5 OUT 8 OUT 13 OUT 10 VAC DC 5 +24 VDC COM 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 COM 2 IN 23 24 COM IN 0 IN 2 COM IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 Gro up 1 Gro up 2 Gro up 3 Gro up 4 Gro up 5 Inputs Outputs
Group 0 Group 1 Group 2
Gro up 0 OUT 11 OUT 9 VDC NEUT VAC DC 0 VAC DC 1 VDC 2 OUT 3 OUT 5 OUT 7 VAC DC 3 OUT 14 OUT 12 OUT 15 +24 VDC OUT 0 OUT 1 OUT 2 OUT 4 OUT 8 OUT 6 COM 2 OUT 13 OUT 10 VAC DC 4 NC NC COM 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 COM 2 IN 23 IN 0 IN 2 COM IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 Inputs Outputs Group 0 Group 1 Gro up 0 Group 2 Gro up 2 Gro up 1 Gro up 3 Gro up 4
1762-L40BWA 1762-L40BWAR
Group 0 DC COM 0 I/0 through I/3 Group 1 DC COM 1 I/4 through I/7 Group 2 DC COM 2 I/8 through I/23
1762-L40BXB 1762-L40BXBR
Group 0 DC COM 0 I/0 through I/3 Group 1 DC COM 1 I/4 through I/7 Group 2 DC COM 2 I/8 through I/23
Table 3.4 Output Terminal Grouping
Controller Outputs Output Group Voltage Terminal Output Terminal Description 1762-L24AWA 1762-L24AWAR
Group 0 VAC/VDC 0 O/0
Isolated Relay outputs Group 1 VAC/VDC 1 O/1
Group 2 VAC/VDC 2 O/2 through O/3 Group 3 VAC/VDC 3 O4 through O/5 Group 4 VAC/VDC 4 O/6 through O/9
1762-L24BWA 1762-L24BWAR
Group 0 VAC/VDC 0 O/0
Isolated Relay outputs Group 1 VAC/VDC 1 O/1
Group 2 VAC/VDC 2 O/2 through O/3 Group 3 VAC/VDC 3 O/4 through O/5 Group 4 VAC/VDC 4 O/6 through O/9
1762-L24BXB 1762-L24BXBR
Group 0 VAC/VDC 0 O/0 Isolated Relay outputs Group 1 VAC/VDC 1 O/1
Group 2 VDC 2, VDC COM 2
O/2 through O/6 Isolated FET outputs Group 3 VAC/VDC 3 O/7 through O/9 Isolated Relay
outputs
1762-L40AWA 1762-L40AWAR
Group 0 VAC/VDC 0 O/0
Isolated Relay outputs Group 1 VAC/VDC 1 O/1
Group 2 VAC/VDC 2 O/2 through O/3 Group 3 VAC/VDC 3 O/4 through O/7 Group 4 VAC/VDC 4 O/8 through
O/11 Group 5 VAC/VDC 5 O/12 through
O/15
1762-L40BWA 1762-L40BWAR
Group 0 VAC/VDC 0 O/0
Isolated Relay outputs Group 1 VAC/VDC 1 O/1
Group 2 VAC/VDC 2 O/2 through O/3 Group 3 VAC/VDC 3 O/4 through O/7 Group 4 VAC/VDC 4 O/8 through
O/11 Group 5 VAC/VDC 5 O/12 through
O/15
Table 3.3 Input Terminal Grouping
Controller Inputs
1762-L40BXB 1762-L40BXBR
Group 0 VAC/VDC 0 O/0 Isolated Relay outputs Group 1 VAC/VDC 1 O/1
Group 2 VDC 2, VDC COM 2
O/2 through O/9 Isolated FET outputs Group 3 VAC/VDC 3 O/10 through
O/11 Isolated Relay outputs Group 4 VAC/VDC 4 O/12 through
O/15
Table 3.4 Output Terminal Grouping
Controller Outputs Output Group Voltage Terminal Output Terminal Description
Sinking and Sourcing
Wiring Diagrams
Any of the MicroLogix 1200 DC embedded input groups can be configured as sinking or sourcing depending on how the DC COM is wired on the group. Refer to pages 3-13 through 3-17 for sinking and sourcing wiring diagrams.
1762-L24AWA, 1762-L24BWA, 1762-L24BXB, 1762-L24AWAR,
1762-L24BWAR and 1762-L24BXBR Wiring Diagrams
Figure 3.7 1762-L24AWA and 1762-L24AWAR Input Wiring Diagram (1)
(1) “NC” terminals are not intended for use as connection points.
Type Definition
Sinking Input The input energizes when high-level voltage is applied to the input terminal (active high). Connect the power supply VDC (-) to the input group’s COM terminal.
Sourcing Input The input energizes when low-level voltage is applied to the input terminal (active low). Connect the power supply VDC (+) to the input group’s COM terminal.
ATTENTION The 24V dc sensor power source must not be used to
power output circuits. It should only be used to power input devices (for example sensors and switches). See Master Control Relay on page 2-8 for information on MCR wiring in output circuits.
TIP In the following diagrams, lower case alphabetic
subscripts are appended to common-terminal connections to indicate that different power sources may be used for different isolated groups, if desired.
L1a L1b L1a L1b L2a L2b IN 0 IN 2 COM IN 5 IN 7 IN 9 1 IN 11 IN 13 NC COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 NC
Figure 3.8 1762-L24BWA and 1762-L24BWAR Sinking Input Wiring Diagram
Figure 3.9 1762-L24BWA and 1762-L24BWAR Sourcing Input Wiring Diagram
+24 VDC 24 COM IN 0 IN 2 COM 1 IN 5 IN 7 IN 9 IN 11 IN 13 COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 -DCb +DCb +DCb +DCa +DCa +DC -DCa -DC +24 VDC 24 COM IN 0 IN 2 COM 1 IN 5 IN 7 IN 9 IN 11 IN 13 COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 -DCb -DC +DCa -DCb +DCb +DC -DCa -DCa 24V dc Sensor Power
Figure 3.10 1762-L24BXB and 1762-L24BXBR Sinking Input Wiring Diagram
Figure 3.11 1762-L24BXB and 1762-L24BXBR Sourcing Input Wiring Diagram
Figure 3.12 1762-L24AWA, 1762-L24BWA, 1762-L24AWAR, and 1762-L24BWAR Output Wiring Diagram
NOT USED IN 0 IN 2 COM 1 IN 5 IN 7 IN 9 IN 11 IN 13 COM 0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 -DCb -DCa +DCb +DCb +DCa +DCa NOT USED NOT USED 0 IN 2 COM1 IN 5 IN 7 IN 9 IN 11 IN 13 COM0 IN 1 IN 3 IN 4 IN 6 IN 8 IN 10 IN 12 +DCb +DCa -DCb -DCb -DCa -DCa NOT USED CR CR CR CR L2 L1 -DCa +DCa L1a L1b L2d L2c L1d L2a L2b L2b L1c L2d L2c VAC L1 VAC NEUT VAC DC 0 VAC DC 1 VAC DC 2 OUT 3 VAC DC 4
OUT 4 OUT 7 OUT 9 OUT 0 OUT 1 OUT 2 VAC
DC 3
Figure 3.13 1762-L24BXB and 1762-L24BXBR Output Wiring Diagram
1762-L40AWA, 1762-L40BWA, 1762-L40BXB, 1762-L40AWAR,
1762-L40BWAR and 1762-L40BXBR Wiring Diagrams
Figure 3.14 1762-L40AWA and 1762-L40AWAR Input Wiring Diagram
Figure 3.15 1762-L40BWA and 1762-L40BWAR Sinking Input Wiring Diagram
CR CR CR +DC -DCa -DCb -DCc +DCa +DCb +DCc -DCc L1d L2d L2d -DC +24 VDC VDC NEUT VAC DC 0 VAC DC 1 VDC 2 OUT 3 COM 2 OUT 5 OUT 7 OUT 9 OUT 0 OUT 1 OUT 2 OUT 4 OUT 6 VAC OUT 8 DC 3 CR NC IN 0 IN 2 COM IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 COM 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23 COM 2 NC L2a L2b L2c L1a L1b L1c L1a L1b L1c IN 0 IN 2 C O M IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 C O M 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23 C O M 2 + 2 4 V D C 2 4 C O M -DC -DCa -DCc -DCb +DCb +DCc +DCc +DCb +DC +DCa +DCa
Figure 3.16 1762-L40BWA and 1762-L40BWAR Sourcing Input Wiring Diagram
Figure 3.17 1762-L40BXB and 1762-L40BXBR Sinking Input Wiring Diagram
Figure 3.18 1762-L40BXB and 1762-L40BXBR Sourcing Input Wiring Diagram
IN 0 IN 2 C O M IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 C O M 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23 C O M 2 + 2 4 V D C 2 4 C O M -DC +DC +DCa +DCc -DCc -DCc -DCa -DCa -DCb +DCb -DCb IN 0 IN 2 COM IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 COM 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23 COM 2 NOT USED NOT USED +DCb +DCc +DCc +DCb +DCa +DCa -DCb -DCc -DCa IN 0 IN 2 COM IN 5 IN 7 IN 8 1 IN 10 IN 12 IN 14 IN 16 IN 18 IN 20 IN 22 COM 0 IN 1 IN 3 IN 4 IN 6 IN 9 IN 11 IN 13 IN 15 IN 17 IN 19 IN 21 IN 23 COM 2 NOT USED NOT USED -DCa -DCa +DCb -DCb -DCb +DCa +DCc -DCc -DCc
Figure 3.19 1762-L40AWA, 1762-L40BWA, 1762-L40AWAR, and 1762-L40BWAR Output Wiring Diagram
Figure 3.20 1762-L40BXB and 1762-L40BXBR Output Wiring Diagram
Controller I/O Wiring
Minimize Electrical Noise
Because of the variety of applications and environments where controllers are installed and operating, it is impossible to ensure that all environmental noise will be removed by input filters. To help reduce the effects of environmental noise, install the MicroLogix 1200 system in a properly rated (NEMA) enclosure. Make sure that the MicroLogix 1200 system is properly grounded. A system may malfunction due to a change in the operating environment after a period of time. We recommend periodically checking system operation, particularly when new machinery or other noise sources are installed near the Micrologix 1200 system. CR CR CR CR CR CR CR CR L2 L1 L1a L1b L1c L2a L2b L2c L2c L2d L2f L2f L2e L2e L2d L1d L1f L1e OUT 11 VAC DC 4 VAC NEUT VAC DC 0 VAC DC 1 VAC DC 2 OUT 3 OUT 4 6 OUT OUT 9 OUT14 OUT 12 OUT 15 VAC L1 OUT 0 OUT 1 OUT 2 VAC DC 3 OUT 7 OUT 5 OUT 8 OUT 13 OUT 10 VAC DC 5 CR CR CR CR CR CR CR CR -DC -DCe -DCe +DCd -DCd -DCc -DCc -DCd -DCa +DC -DCb +DCe +DCa +DCb +DCc OUT 11 OUT VDC NEUT VAC DC 0 VAC DC 1 VDC 2 OUT 3 OUT 5 7 OUT VAC DC3 OUT 14 OUT 12 OUT 15 +24 VDC OUT 0 OUT 1 OUT 2 OUT 8 COM OUT 13 OUT 10 VAC DC 4 9 OUT 4 OUT 6 CR
Expansion I/O Wiring
The following sections show the discrete and analog expansion I/O wiring diagrams.Discrete Wiring Diagrams
Figure 3.21 1762-IA8 Wiring Diagram
Figure 3.22 1762-IQ8 Wiring Diagram
IN 7 IN 5 IN 3 IN 1 AC COM IN 6 IN 4 IN 2 IN 0 L1 L2 100/120V ac AC COM Common connected internally. IN 7 IN 5 IN 3 IN 1 DC COM IN 6 IN 4 IN 2 IN 0 24V dc DC
COM Common connected
internally. -DC (sinking)
+DC (sourcing) +DC (sinking) -DC (sourcing)
Figure 3.23 1762-IQ16 Wiring Diagram IN 7 IN 5 IN 3 IN 1 IN 6 IN 4 IN 2 IN 0 24V dc IN 15 IN 13 IN 11 IN 9 DC COM 0 IN 14 IN 12 IN 10 IN 8 24V dc DC COM 1 +DC (Sinking) -DC (Sourcing) -DC (Sinking) +DC (Sourcing) +DC (Sinking) -DC (Sourcing) -DC (Sinking) +DC (Sourcing)
Figure 3.24 1762-IQ32T Wiring Diagram
Figure 3.25 1762-OA8 Wiring Diagram
44920 OUT 5 VAC 1 OUT 2 OUT 0 OUT 7 OUT 4 OUT 3 OUT 1 VAC 0 OUT 6 CR CR CR CR CR CR L2 L1 L2 L1
Figure 3.26 1762-OB8 Wiring Diagram
Figure 3.27 1762-OB16 Wiring Diagram
+DC 24V dc (source) -DC OUT 6 OUT 4 OUT 2 OUT 0 OUT 7 OUT 5 OUT 3 OUT 1 +VDC CR CR CR CR CR CR DC COM OUT 6 OUT 2 OUT 0 OUT 10 OUT 5 OUT 7 OUT 9 OUT 11 OUT 13 OUT 15 OUT 14 OUT 3 OUT 1 VDC+ OUT 8 OUT 12 CR CR CR CR CR CR CR CR CR CR OUT 4 DC COM 24V dc (source) +DC -DC
Figure 3.28 1762-OB32T Wiring Diagram
Figure 3.29 1762-OV32T Wiring Diagram
44925
Figure 3.30 1762-OW8 Wiring Diagram
Figure 3.31 1762-OW16 Wiring Diagram
OUT 5 VAC-VDC2 OUT 2 OUT 0 OUT 7 OUT 4 OUT3 OUT 1 VAC-VDC 1 OUT 6 CR CR CR CR CR CR L1 VAC1 + L2 DC1 COM L1 VAC2 + L2 DC2 COM OUT 2 OUT 0 OUT 3 OUT 1 VAC-VDC 0 CR CR CR OUT 6 OUT 4 OUT 7 OUT 5 CR CR CR OUT 10 OUT 8 OUT 11 OUT 9 VAC-VDC 1 CR CR CR OUT 14 OUT 12 OUT 15 OUT 13 CR CR CR L1 L2 +DC -DC
Figure 3.32 1762-OX6I Wiring Diagram L1-0 L1-1 L1-2 L1-3 L1-4 L1-5 OUT0 N.C. OUT0 N.O. OUT1 N.C. OUT1 N.O. OUT2 N.C. OUT2 N.O. OUT3 N.O. OUT3 N.C. OUT4 N.C. OUT4 N.O. OUT5 N.C. OUT5 N.O. CR CR CR CR CR CR L1 OR +DC L1 OR +DC L1 OR +DC L1 OR +DC L1 OR +DC L1 OR +DC L2 OR -DC L2 OR -DC L2 OR -DC L2 OR -DC L2 OR -DC L2 OR -DC
Figure 3.33 1762-IQ8OW6 Wiring Diagram
Analog Wiring
System Wiring Guidelines
Consider the following when wiring your analog modules:
•The analog common (COM) is not connected to earth ground inside the
module. All terminals are electrically isolated from the system.
•Channels are not isolated from each other.
•Use Belden 8761, or equivalent, shielded wire.
•Under normal conditions, the drain wire (shield) should be connected to
the metal mounting panel (earth ground). Keep the shield connection to earth ground as short as possible.
•To ensure optimum accuracy for voltage type inputs, limit overall cable
impedance by keeping all analog cables as short as possible. Locate the I/O system as close to your voltage type sensors or actuators as possible.
•The module does not provide loop power for analog inputs. Use a
power supply that matches the input transmitter specifications.
IN 6 IN 4 IN 3 IN 1 IN 5 IN 2 IN 0 OUT 4 OUT 2 OUT 0 VAC VDC VAC VDC DC COM 1 OUT 3 OUT 1 IN 7 L1 or +DC L1 or +DC -DC (Sinking) +DC (Sourcing) Connected Internally +DC (Sinking) -DC (Sourcing) L2 or -DC OUT 5 +DC (Sinking) -DC (Sourcing) -DC (Sinking) +DC (Sourcing) DC COM 0 CR CR CR CR
